#VU66985 Permissions, Privileges, and Access Controls in pcs - CVE-2022-2735

Vulnerability identifier: #VU66985

Vulnerability risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2022-2735

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
pcs
Web applications / Remote management & hosting panels

Vendor: ClusterLabs

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect permissions set on a Unix socket used for internal communication between PCS daemons. A local user can obtain the authentication token for hacluster and gain control over the cluster managed by pcs.

Mitigation
Install update from vendor's website.

Vulnerable software versions

pcs: 0.10.5 - 0.11.3.1

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=2116815
https://www.openwall.com/lists/oss-security/2022/09/01/4
https://github.com/ClusterLabs/pcs/commit/de068e2066e377d1cc77edf25aed0198e4c77f7b

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.